TRANS-UNION UNPROFESSIONAL AND UNRELIABLE

I AM STRUGGLING TO GET MY NAME REMOVED BY TRANSUNION WHILE OTHER Bureaus HAVE DE-LISTED ME. AFTER A FEW MONTHS I HAVE DECIDED TO DISPUTE THE DEFAULT ATTACHED THE PAID UP LETTER AND I WAS TOLD TO WAIT FOR 21 DAYS AND 21 DAYS HAS LONG GONE I CALLED THEY SAID THEY WILL TRANSFER THE MATTER TO THEIR REMOVAL DEPARTMENT AND I SHALL RECEIVE FEEDBACK WITHIN 24HOURS. A DAY AFTER 24HOURS I GET MY MESSAGE WITH THE REFERENCE NUMBER PROVIDED THAT MY ACCOUNT HAS BEEN UPDATED AND BOOM I GO ON MY CREDIT REPORT MY ACCOUNT HAS NOT BEEN UPDATED . THE PAIN OF BEING DEFAULTED WHILE YOU HAVE PAID THE ACCOUNT MORE THAN 4 MONTHS AGO IS TERRIBLE NOW WHAT MUST I DO?